Wikipedia
A big way is a type of formation skydiving involving a large group of skydivers coming together while in freefall to form a specific and predetermined formation. All the skydivers involved aim to connect with each other and hold the complete formation for a designated period (a number of seconds).
A sequential skydive would involve multiple formations. Grips between individual skydivers can be on any part of the hand/arm or legs. The jumpsuits worn are specifically designed with handle-like grips to assist.
There is a lot of behind the scenes work prior to organization of any big way event. This includes not only the invitation of individual skydivers, but also the coordination of aircraft, pilots, freefall and ground cameras as well as all support and ground staff.